php - Passing object method to array_map()

Question

    class theClass{
         function doSomeWork($var){
            return ($var + 2);
         }

         public $func = "doSomeWork";

         function theFunc($min, $max){
            return (array_map(WHAT_TO_WRITE_HERE, range($min, $max)));
         }
    }

$theClass = new theClass;
print_r(call_user_func_array(array($theClass, "theFunc"), array(1, 5)));
exit;

Can any one tell what i can write at WHAT_TO_WRITE_HERE, so that doSomeWork function get pass as first parameter to array_map. and code work properly.

And give out put as

Array
(
    [0] => 3
    [1] => 4
    [2] => 5
    [3] => 6
    [4] => 7
)

Answer 1

To use object methods with array_map(), pass an array containing the object instance and the method name. For same-object scope, use $this as normal. Since your method name is defined in your public $func property, you can pass $this->func. This applies to most functions that accept a callback as an argument.

As a side note, the parentheses outside array_map() aren't necessary.

return array_map(array($this, $this->func), range($min, $max));